Determination of the decarburation depth

Presentation for participants

Reference of the ILC: DC21LS
References of test methods: ISO 3887  ASTM E1077
Frequency: This ILC can be organised this year thanks to our preregistration procedure, which ensures an enough number of participants.
Main characteristics: d₁ (total decarburization), d₂ (functional decarburization), d₃ (partial decarburization), d₄ (global decarburization)
Other characteristics: Surface carbon content, heart carbon content, surface hardness, heart hardness
Caution: The number of determinations may be low for the secundary characteristics, what may make inefficient the comparison between laboratories
Determination of the assigned values (“true values” for each characteristic): By statistical computation of the totality of the results with possible selection on competence criteria (accreditation, validation by a reference body, quantity of tests performed in the year), test to detect possible collusion, merging of results not obtained in reproductibility conditions, suppression of technically unvalid results.
Type of statistical computation: For numerical results, the statistical computation will provide an assigned value with its attached uncertainty, values of standard deviations for repeatability and reproductibility, limits of alerts for bias and repeatability of the participant, indiviual values for uncertainty of results of participants.
Number of products submitted to tests: 1
Number of samples per participation: 6
Max number of operators per participation: 10 (For this CIL, the type of test and sample size allow to provide results determined by several different operators and by several different methods)
Product submitted to tests: Low alloyed steel
Type of samples: Discs
Approximate dimensions of samples: Ø40x50 mm
Specific preparation to be performed by the participant:  Preparation of surfaces of observation
Special notice for this ILC: Determinations of d₁, d₂, d₃, d₄ can be performed with the 3 methods : metallographic, chemical and/or hardness
Time schedule:
Opening date of registrations 20/04/2021
Registration deadline 30/06/2021
Date of shipment of samples 05/09/2021
Start of the tests 15/09/2021
Deadline for carrying out the tests and providing the results 31/10/2021
Date of delivery of reports 15/12/2021
Note: After the deadline, registrations are only accepted within the limit of availability of samples
Price (€) 350
Price if online payment (€) 280
Approximate weight (kg) 2